Siemens SINUMERIK 840D sl Function Manual page 765

The size of the tolerance windows is set with machine data of the FS. Reaching of the
synchronism is influenced by the following factors:
● AV, DV: Position variance between FS and LS
● VV: Difference in speed between FS and LS
Figure 14-3
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
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Synchronism monitoring with COUPON and synchronism test mark WAITC with
synchronization on a turning leading spindle
S3: Synchronous spindle
14.1 Brief description
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